仅更新客户端矩形

你好，

我一直在开发一个多线程 MFC 应用程序，需要在图片控件上绘制图形。一切似乎

除了图片控件在调用图片的 Invalidate 函数时不会重绘之外，工作正常

控制。如果我在对话框上调用 Invalidate，整个窗口将被重绘并发生闪烁。关于我在哪里的任何建议

出问题了吗？我已经尝试过这个但没有帮助： http://computer-programming-forum.com/82-mfc/1d8b6d604dd7c393.htm

代码：

C++

DWORD WINAPI CDlg::WorkerThread(LPVOID lpVoid)
{
CDlg* appPtr = (CDlg*)lpVoid;
CStatic* pStatic = (CStatic*)appPtr->GetDlgItem(IDC_GRAPH_WINDOW);

while(true)
{
// Plotting graph
// Requires Update
appPtr->UpdatePoints(i);
pStatic->PostMessage(WM_PAINT);
}
}

解决方案1
解决方案3

解决方案1

我认为问题在于工作线程对 GUI 的访问。看看这篇文章，看看如何做正确的方法：使用工作线程[^]

Worker threads and the GUI II: Don't touch the GUI

That's right. A worker thread must not touch a GUI object. This means that you should not query the state of a control, add something to a list box, set the state of a control, etc.

Why?

Because you can get into a serious deadlock situation. A classic example was posted on one of the discussion boards, and it described something that had happened to me last year. The situation is this: you start a thread, and then decide to wait for the thread to complete. Meanwhile, the thread does something apparently innocuous, such as add something to a list box, or, in the example that was posted, calls FindWindow. In both cases, the process came to a screeching halt, as all threads deadlocked.